Question

For the following system of equations, what is the x- value of the solution?
-x + 2y = 6
6y = x + 18
A. -1
B. 0
C. 1
D. 6

Answer 1

@plainntall

Answer 2

@sweetburger

Answer 3

@Mehek14

Answer 4

Do you want to use substitution or elimination

Answer 5

What do you mean?

Answer 6

To solve

Answer 7

I dont know what that is sorry D:

Answer 8

That's why I'm asking so I can show you how to use it

Answer 9

oh ok

Answer 10

So which one do you want to use?

Answer 11

wait I think I know what they mean so substitution is where you pull answer's like A B C or D right? Lets do that if that's the case.

Answer 12

No

Answer 13

Substitution is when we use the value of either x or y from one equation and plug it into the other equation

Answer 14

uhm okay

Answer 15

so then that?

Answer 16

Well are we going to use substitution or elimination?

Answer 17

subsitution

Answer 18

Solve for x in the second equation

6y = x + 18

Answer 19

okay how?

Answer 20

isolate x

Answer 21

oh okay 18-6 = 12 how would that connect with the equation?

Answer 22

I have no idea how you got 18 - 6 = 12

Answer 23

ugh I don't know either then again I don't even know how to do this please help :/

Answer 24

Ok to isolate x

6y = x + 18

you would subtract 18 on both sides

6y - 18 = x

Answer 25

Thats what I was trying to do so I got 12

Answer 26

you cannot subtract 6y - 18 and get 12

Answer 27

all we were doing was solving for x

Answer 28

okay so whats the answer

Answer 29

Well we just isolated x so it's

6y - 18 = x

now we substitute `6y - 18` instead of x in the first equation

Answer 30

ok

Answer 31

So substitute that into the first equation

Answer 32

how would I do that? What does it look like?

Answer 33

instead of x in the first equation, put 6y - 18

Answer 34

so then 6y -18 +2y =6?

Answer 35

-(6y - 18) + 2y = 6

-6y + 18 + 2y = 6

combine -6y + 2y =

Answer 36

4?

Answer 37

-4y

Answer 38

So

18 - 4y = 6

6 - 18 = ?

Answer 39

12

Answer 40

-12

Answer 41

oh ok

Answer 42

-4y = -12

-12/-4 = ?

Answer 43

-3

Answer 44

3

Answer 45

so y = 3

Answer 46

put -3 instead of y in any equation and solve for x

Answer 47

okay one moment

Answer 48

-4y = -12 this equation?

Answer 49

no

Answer 50

the 2 you have

Answer 51

oh so then -3 + 2y = 6

Answer 52

-3 instead of y not x

Answer 53

oh so then -x + 2(-3)= 6

Answer 54

6(-3) = x + 18

Answer 55

You just have to use one of them

solve and you get x = 0

Answer 56

Okay so the overall answer is 0?

Answer 57

Yes

Answer 58

Thank you I really appreteate that!!!

Answer 59

You're welcome :)